Neutron stars are the collapsed cores of supergiant stars.[1] They are created as a result of supernovas and gravitational collapse,[2] and are the second smallest and densest class of stellar objects.[3] In the cores of these stars, protons and electrons combine to form neutrons.[2] Neutron stars can be classified as pulsars if they are magnetized, if they rotate, and if they emit beams of electromagnetic radiation out of their magnetic poles.[4]
^Heger, A.; Fryer, C. L.; Woosley, S. E.; Langer, N.; Hartmann, D. H. (2003). "How Massive Single Stars End Their Life". Astrophysical Journal. 591 (1): 288–300. arXiv:astro-ph/0212469. Bibcode:2003ApJ...591..288H. doi:10.1086/375341. S2CID 59065632.
^ a b"Imagine the Universe!: Neutron Stars". National Aeronautics and Space Administration - Goddard Space Flight Center. 23 September 2023. Retrieved 7 January 2024.
^Glendenning, Norman K. (2012). Compact Stars: Nuclear Physics, Particle Physics and General Relativity (illustrated ed.). Springer Science & Business Media. p. 1. ISBN 978-1-4684-0491-3. Archived from the original on 2017-01-31. Retrieved 2016-03-21.
^Hester, Jeff; Scowen, Paul (30 May 1996). "The Crab Nebula From the Ground (left) and Its Interior With Pulsar". Hubblesite. Retrieved 7 January 2024.
^"PSR B1509-58: A Young Pulsar Shows its Hand". Chandra X-Ray Observatory. 3 April 2009. Retrieved 7 January 2024.
^"Pulsar Planets". Archived from the original on 2005-12-30.
^Backer, D. C.; Kulkarni, S. R.; Heiles, C.; Davis, M. M.; et al. (1982). "A millisecond pulsar". Nature. 300 (5893): 315–318. Bibcode:1982Natur.300..615B. doi:10.1038/300615a0. S2CID 4247734.